is this where the "letter of interest" comes in, or when you say boosting stats do you mean retaking classes/MCAT?What that means is that you can be called up to an interview, but most, if not all, of the time you need to be proactive by updating your file with the file boosting stats or you won't hear from them again.
cGPA 3.47i see; for those that got the hold letter, what were your stats like and when were you complete ? i'm waiting to hear back from them too
maybe they're holding until they hear back from the students who have been accepted and have until Dec 15 to decide. maybe they've given out too many offers